Thread: Does a Suehiro 20k need to be lapped?

Originally Posted by Euclid440

Yes it does and it is hard, very hard. I use a 140 diamond plate and it took some work. I had a small dip in the center of the stone and had to remove a bit of the stone face. The dip left scratches on the bevel until it was flat and smooth.

I then use a 300, 600 and 1200 diamond plates, then a 1k and 4k to smooth.

Grid the stone several times to get it flat, I think you will only have to do it once it is hard and will not be getting that many laps.

If you get scratches on a bevel, lap it again.

Check the other side to see which is flatter to begin with.

+1 - Very hard - mine took forever to lap with SGDLP - but once it's flat it will stay that way...

-john

Here is mine, gotten over a year or more ago, and I lapped it immediately. As you see, the corner is still not lapped. At the first go round I called it 'good' when I knew I had enough real estate to hone a razor. Figuring as time went on I'd eventually get through that corner with the lapping plate.

Many, many sessions of lapping/honing later, it is what it is. If I live long enough maybe the whole thing will be uniformly flat one day, but no sense wasting stone, when there is enough to use, just to say "it's flat" ........